JPH04231B2 - - Google Patents
Info
- Publication number
- JPH04231B2 JPH04231B2 JP58013147A JP1314783A JPH04231B2 JP H04231 B2 JPH04231 B2 JP H04231B2 JP 58013147 A JP58013147 A JP 58013147A JP 1314783 A JP1314783 A JP 1314783A JP H04231 B2 JPH04231 B2 JP H04231B2
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- circuit
- voltage
- predetermined
- reference voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 230000006866 deterioration Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Tests Of Electric Status Of Batteries (AREA)
- Stand-By Power Supply Arrangements (AREA)
Description
【発明の詳細な説明】
本発明は通信用端末装置などにおいて用いられ
る予備電源の監視方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for monitoring a standby power source used in communication terminal devices and the like.
従来より公衆電話機、ボタン電話装置などのよ
うな局から通信回線を介して送られてくる電源の
他に一般の商用電源を併用する通信用端末装置に
おいては、商用電源の停電時に使用不能となつた
り、あるいはサービス性を著しく落とす可能性が
あるため、予備電源を搭載することにより、商用
電源の停電時にも同等のサービスを維持するよう
対策がとられていた。このような端末装置の予備
電源としては小形で繰り返し使用ができるニツケ
ル・カドミウム蓄電池、シール鉛蓄電池などの２
次電池が多く使われていた。しかしながら、これ
らの端末装置は設備場所の温度条件が低温から高
温まで広範囲にわたるため前記２次電池の寿命推
定が難しく、また、商用電源の停電の頻度は一年
に数回程度と極めて少なく２次電池使用期間の大
半の時間は該２次電池の自己放電量を補充するた
めの充電状態にあるなどの理由から２次電池の交
換周期の設定が難しく、更にまた、装置が別の原
因で故障することも多く同一設置場所に長く置か
れるという保証がないので、該２次電池の管理は
極めて困難であつた。このため高信頼性を要求さ
れる端末装置に２次電池を搭載する場合は推定寿
命より早めに定期的に交換するか、あるいは充放
電の繰り返し回数を計数して交換時期を決めるな
どして使用しなければならず、保守の手間、コス
トなどがかかる欠点があつた。 Conventionally, communication terminal devices such as public telephones and key telephones that use general commercial power in addition to the power sent from stations via communication lines have become unusable in the event of a commercial power outage. Since there is a possibility that the service quality may be significantly degraded, countermeasures have been taken to maintain the same level of service even in the event of a commercial power outage by installing a backup power source. As a backup power source for such terminal devices, there are two types of small and reusable nickel-cadmium storage batteries, sealed lead-acid batteries, etc.
Secondary batteries were often used. However, since the temperature conditions at the equipment location of these terminal devices range widely from low to high temperatures, it is difficult to estimate the lifespan of the secondary batteries, and the frequency of commercial power outages is extremely low, only a few times a year. It is difficult to set a replacement cycle for the secondary battery because most of the time when the battery is used is in a charging state to replenish the self-discharge of the secondary battery, and furthermore, the device may break down due to other reasons. It has been extremely difficult to manage secondary batteries because there is no guarantee that they will remain in the same location for a long time. Therefore, if a secondary battery is installed in a terminal device that requires high reliability, it should be replaced periodically earlier than its estimated lifespan, or the replacement timing should be determined by counting the number of repeated charging and discharging cycles. However, it has the disadvantage of requiring maintenance work and cost.
また、電池の性能劣化を簡便に推定する方法と
して、一定の試験条件で放電容量を測定し判定す
る方法があるが、これを実施する場合は端末装置
から２次電池を取り出さなければならず、またそ
の判定に長い時間を必要とする点などから広い地
域に多数設置される前記通信用端末装置に適用す
るには保守者も含めてコストがかかりすぎるとい
う欠点があつた。 In addition, a method for easily estimating battery performance deterioration is to measure and judge the discharge capacity under certain test conditions, but when carrying out this method, the secondary battery must be removed from the terminal device. In addition, since it takes a long time to make the determination, it is too costly for maintenance personnel to apply to the communication terminal devices that are installed in large numbers in a wide area.
本発明は上記従来の欠点に鑑み、２次電池の寿
命、交換時期等を簡単かつ的確に監視し得るよう
になしたもので、その要旨とするところは２次電
池の端子電圧を所定の基準電圧と比較する比較回
路と、２次電池に所定の値の急速充電電流を供給
する急速充電回路と、２次電池より所定の値の放
電電流を放電させる擬似放電回路と、前記各動作
を司る制御部とを備え、前記制御部は、前記比較
回路で２次電池の端子電圧が基準電圧以下に降下
したことを検出すると、該２次電池に前記所定の
急速充電電流を所定時間充電させ、更に前記擬似
放電回路で所定時間放電させ、再度比較回路で２
次電池の端子電圧を基準電圧と比較することによ
り、２次電池劣化を判定するようになしたことを
特徴とする端末装置用予備電源の監視方式と、２
次電池の端子電圧を所定の基準電圧と比較する比
較回路と、充電電流値を任意の値に設定し得る可
変充電回路と、２次電池より所定の値の放電電流
を放電させる擬似放電回路と、前記各動作を司る
制御部とを備え、前記制御部は通常、前記可変充
電回路よりトリクル充電電流を２次電池に供給さ
せ、前記比較回路で２次電池の端子電圧が基準電
圧以下に降下したことを検出すると前記可変充電
回路より所定の値の急速充電電流を２次電池に所
定時間供給させ、更に前記擬似放電回路で所定時
間放電させ、再度比較回路で２次電池の端子電圧
を基準電圧と比較することにより２次電池劣化を
判定するようになしたことを特徴とする端末装置
用予備電源の監視方式にある。以下図面について
詳細に説明する。 In view of the above-mentioned conventional drawbacks, the present invention has been made to enable easy and accurate monitoring of the life span, replacement timing, etc. of a secondary battery. A comparison circuit that compares the voltage, a quick charge circuit that supplies a predetermined value of quick charge current to the secondary battery, a pseudo discharge circuit that discharges a predetermined value of discharge current from the secondary battery, and a pseudo discharge circuit that controls each of the above operations. and a control unit, when the comparison circuit detects that the terminal voltage of the secondary battery has dropped below a reference voltage, the control unit charges the secondary battery with the predetermined quick charging current for a predetermined time; Furthermore, the dummy discharge circuit discharges for a predetermined time, and the comparison circuit again
A monitoring method for a standby power source for a terminal device, characterized in that deterioration of a secondary battery is determined by comparing the terminal voltage of the secondary battery with a reference voltage;
A comparison circuit that compares the terminal voltage of a secondary battery with a predetermined reference voltage, a variable charging circuit that can set the charging current value to an arbitrary value, and a pseudo discharge circuit that discharges a predetermined value of discharge current from the secondary battery. , a control unit that controls each of the operations, and the control unit normally causes the variable charging circuit to supply trickle charging current to the secondary battery, and causes the comparison circuit to cause the terminal voltage of the secondary battery to drop below a reference voltage. When this is detected, the variable charging circuit supplies a rapid charging current of a predetermined value to the secondary battery for a predetermined period of time, the pseudo discharge circuit discharges the battery for a predetermined period of time, and the comparison circuit again uses the terminal voltage of the secondary battery as a reference. A method for monitoring a standby power source for a terminal device is characterized in that deterioration of a secondary battery is determined by comparing it with a voltage. The drawings will be explained in detail below.
第１図は本発明方式を適用した通信用端末装置
の電源部の第１の実施例を示すもので、図中、
１，２は商用電源の入力端子、３は整流・平滑回
路、４は端末装置の負荷回路、５は第１のタイマ
ー回路、６はトリクル充電回路、７は複数のセル
よりなる２次電池、８は切換え回路、９は急速充
電回路、１０は擬似放電回路、１１は第２のタイ
マー回路、１２は制御部、１３は停電検出回路、
１４は比較回路である。 FIG. 1 shows a first embodiment of a power supply section of a communication terminal device to which the method of the present invention is applied.
1 and 2 are input terminals of commercial power supply, 3 is a rectifier/smoothing circuit, 4 is a load circuit of a terminal device, 5 is a first timer circuit, 6 is a trickle charging circuit, 7 is a secondary battery consisting of a plurality of cells, 8 is a switching circuit, 9 is a quick charging circuit, 10 is a pseudo discharge circuit, 11 is a second timer circuit, 12 is a control unit, 13 is a power failure detection circuit,
14 is a comparison circuit.
上記第１のタイマー回路５は制御部１２からの
命令に従つて整流・平滑回路３より供給される直
流電力をトリクル充電回路６又は急速充電回路９
に出力する。ここでトリクル充電回路６には通
常、継続的に電力が出力されるが、急速充電回路
９には予め設定された時間（この時間は任意に設
定できるが、一般に完全充電を目的としていない
ので比較的短時間でよい。）の間のみ電力が出力
され、該急速充電回路９に電力が出力されている
間及び後記試験の際の放電期間の間はトリクル充
電回路６への電力が停止される如くなつている。
トリクル充電回路６は２次電池７のトリクル充電
に必要な0.02Cから0.1C（ここでＣは２次電池７の
定格容量を１時間で除した電流値である。）の範
囲の中の任意な電流値に定電流化した電流を２次
電池７に供給する。また急速充電回路９は２次電
池７の急速充電に必要な0.05Cから0.5Cの範囲の
中の任意な電流値に定電流化した電流を２次電池
７に供給する如くなつている。 The first timer circuit 5 converts the DC power supplied from the rectifier/smoothing circuit 3 into a trickle charging circuit 6 or a quick charging circuit 9 according to a command from the control unit 12.
Output to. Normally, power is continuously output to the trickle charge circuit 6, but the quick charge circuit 9 is supplied with power for a preset time (this time can be set arbitrarily, but since the purpose is generally not to fully charge the battery) Power is output only for a short period of time), and power to the trickle charging circuit 6 is stopped while power is being output to the quick charging circuit 9 and during the discharging period during the test described later. It's becoming like that.
The trickle charging circuit 6 has an arbitrary current value within the range of 0.02C to 0.1C (here, C is the rated capacity of the secondary battery 7 divided by 1 hour) necessary for trickle charging the secondary battery 7. A constant current is supplied to the secondary battery 7 at a constant current value. Further, the quick charging circuit 9 is configured to supply a constant current to the secondary battery 7 at an arbitrary current value within the range of 0.05C to 0.5C necessary for rapid charging of the secondary battery 7.
擬似放電回路１０は定電流回路や固定抵抗など
によつて構成され、２次電池７より0.1Cから2C
程度の電流を放電する如く設定されている。ま
た、第２のタイマー回路１１は制御部１２の命令
に従つて擬似放電回路１０を所定時間の間だけ動
作させるが、該放電時間は放電電流値と放電時間
の積が前記急速充電電流値と充電時間の積より小
さな値になる範囲で任意に設定される。 The pseudo discharge circuit 10 is composed of a constant current circuit, a fixed resistor, etc., and discharges 0.1C to 2C from the secondary battery 7.
It is set to discharge a certain amount of current. Further, the second timer circuit 11 operates the pseudo discharge circuit 10 only for a predetermined time in accordance with the command from the control unit 12, and the discharge time is such that the product of the discharge current value and the discharge time is equal to the quick charge current value. It is set arbitrarily within a value smaller than the product of charging time.
切換え回路８は制御部１２の命令に従つて負荷
回路４と２次電池７とを断続する。また、停電検
出回路１３は商用電源が停電した時、その情報を
制御部１２に送出する如くなつている。比較回路
１４は常時あるいは端末装置の使用時や遠隔にあ
る局からの指令をトリガとして制御部１２の命令
に従つて２次電池７の端子電圧を基準電圧と比較
し、その結果を制御部１２へ送出する如くなつて
いる。該端子電圧の比較はトリクル充電中あるい
は放電中、あるいは充電回路６，９、放電回路１
０のすべてをオフにした状態のいずれでも良い。
なお、図中各回路を結ぶ実線は電力線、破線は情
報線を、それぞれ表わすものとする。 The switching circuit 8 connects and disconnects the load circuit 4 and the secondary battery 7 according to a command from the control section 12 . Further, the power failure detection circuit 13 is configured to send information to the control unit 12 when the commercial power supply fails. The comparison circuit 14 compares the terminal voltage of the secondary battery 7 with a reference voltage in accordance with the commands of the control unit 12 at all times, when using a terminal device, or triggered by a command from a remote station, and transmits the result to the control unit 12. It's starting to look like it's being sent to. The terminal voltages are compared during trickle charging, discharging, charging circuits 6 and 9, and discharging circuit 1.
It may be in any state where all 0's are turned off.
Note that the solid lines connecting each circuit in the figure represent power lines, and the broken lines represent information lines, respectively.
次に動作について説明する。通常、負荷回路４
には入力端子１，２より入力した商用交流電力を
整流・平滑回路３で整流し平滑して得た直流電力
が供給される。この時、切換え回路８はオフ状態
にあり、２次電池７はトリクル充電回路６より供
給される電流によつてトリクル充電される。商用
電源が端末装置の使用中に停電するか、あるいは
停電中に端末装置を使おうとすると、停電検出回
路１３が該商用電源の停電を検出し、この情報を
制御部１２に送出する。制御部１２はこの情報を
受けると、切換え回路８をオンし負荷回路４へ２
次電池７の直流電力を供給させ、サービス性を維
持させる。 Next, the operation will be explained. Normally, load circuit 4
DC power obtained by rectifying and smoothing commercial AC power input through input terminals 1 and 2 in a rectifier/smoothing circuit 3 is supplied to the input terminals 1 and 2. At this time, the switching circuit 8 is in an off state, and the secondary battery 7 is trickle charged by the current supplied from the trickle charging circuit 6. If a power outage occurs in the commercial power source while the terminal device is in use, or if an attempt is made to use the terminal device during a power outage, the power outage detection circuit 13 detects the power outage in the commercial power source and sends this information to the control unit 12. When the control unit 12 receives this information, it turns on the switching circuit 8 and switches the load circuit 4 to 2.
DC power from the secondary battery 7 is supplied to maintain serviceability.
比較回路１４で２次電池７の端子電圧が基準電
圧より低下したことが検出されると、制御部１２
は商用電源が停電か否かを停電検出回路１３の情
報より確認し、停電の時はそのまま何もしない。
一方、停電でない時はタイマー回路５を作動さ
せ、トリクル充電回路６をオフ状態にするととも
に急速充電回路９をオン状態にさせ、２次電池７
を急速充電する。 When the comparison circuit 14 detects that the terminal voltage of the secondary battery 7 has decreased below the reference voltage, the control unit 12
checks whether or not there is a power outage in the commercial power supply from the information from the power outage detection circuit 13, and does nothing if there is a power outage.
On the other hand, when there is no power outage, the timer circuit 5 is activated, the trickle charging circuit 6 is turned off, the quick charging circuit 9 is turned on, and the secondary battery 7 is turned on.
charge quickly.
該急速充電の充電時間が経過すると、制御部１
２はタイマー回路１１を作動させ擬似放電回路１
０をオン状態にし２次電池７からの放電を開始さ
せる。前記放電時間が経過すると、制御部１２は
比較回路１４の情報を再度チエツクする。この
時、２次電池７の端子電圧が基準電圧以上あれ
ば、さきの端子電圧の低下は単なる充電不足によ
るものと判定し通常の運用状態に復帰させる。 When the charging time of the quick charging has elapsed, the control unit 1
2 activates the timer circuit 11 to activate the pseudo discharge circuit 1
0 is turned on to start discharging from the secondary battery 7. When the discharge time has elapsed, the control section 12 checks the information in the comparison circuit 14 again. At this time, if the terminal voltage of the secondary battery 7 is equal to or higher than the reference voltage, it is determined that the previous drop in the terminal voltage is simply due to insufficient charging, and the normal operating state is restored.
一方、前記充・放電を行なつてもなお２次電池
７の端子電圧が基準電圧以下であれば、制御部１
２は２次電池７の性能劣化と判定する。なお、該
判定結果は必要に応じて図示しない表示部に表示
させたり、あるいは所定の加入者線信号を使つて
局側などへ自動送出させたりすることもできる。 On the other hand, if the terminal voltage of the secondary battery 7 is still below the reference voltage even after performing the charging and discharging, the control unit 1
2, it is determined that the performance of the secondary battery 7 has deteriorated. Note that the determination result can be displayed on a display section (not shown) or automatically transmitted to the central office using a predetermined subscriber line signal, if necessary.
第２図は本発明の第２の実施例を示すもので、
ここではトリクル充電と急速充電を一台の充電回
路で行なうようになしている。即ち、図中１５は
充電電流が任意に変えられる可変充電回路であつ
て、タイマー回路５によつて充電時間が制御さ
れ、また制御部１２によつて電流値が制御される
如くなつている。なお、その他の構成、効果は前
記第１の実施例と同様である。 FIG. 2 shows a second embodiment of the invention,
Here, trickle charging and quick charging are performed in one charging circuit. That is, reference numeral 15 in the figure is a variable charging circuit in which the charging current can be changed arbitrarily, and the charging time is controlled by the timer circuit 5, and the current value is controlled by the control section 12. Note that the other configurations and effects are the same as those of the first embodiment.
以上説明したように本発明によれば、２次電池
の端子電圧を所定の基準電圧と比較する比較回路
と、２次電池に所定の値の急速充電電流を供給す
る急速充電回路と、２次電池より所定の値の放電
電流を放電させる擬似放電回路と、前記各動作を
司る制御部とを備え、前記制御部は、前記比較回
路で２次電池の端子電圧が基準電圧以下に降下し
たことを検出すると、該２次電池に前記所定の急
速充電電流を所定時間充電させ、更に前記擬似放
電回路で所定時間放電させ、再度比較回路で２次
電池の端子電圧を基準電圧と比較することによ
り、２次電池劣化を判定するようになしたため、
予備電源としての２次電池を取り出すことなく端
子電圧を検出できかつ端子電圧の低下が停電時の
該２次電池使用による通常の電池容量の減少に起
因するものか、あるいは２次電池の性能劣化によ
るものかを正確に判定でき、従つて２次電池の保
守、管理の手間や費用を少なくすることができ
る。また可変充電回路を用いてトリクル充電電流
と急速充電電流を供給するようになしたものによ
れば、充電回路が一台で済み、より構成が簡単と
なる等の利点がある。 As explained above, according to the present invention, a comparison circuit that compares the terminal voltage of a secondary battery with a predetermined reference voltage, a quick charging circuit that supplies a quick charging current of a predetermined value to the secondary battery, and a A pseudo-discharge circuit that discharges a predetermined value of discharge current from the battery, and a control unit that controls each of the operations, and the control unit is configured to detect that the terminal voltage of the secondary battery has dropped below a reference voltage in the comparison circuit. When detected, the secondary battery is charged with the predetermined quick charging current for a predetermined time, further discharged by the pseudo discharge circuit for a predetermined time, and the comparison circuit again compares the terminal voltage of the secondary battery with the reference voltage. , since the deterioration of the secondary battery is determined,
Terminal voltage can be detected without taking out the secondary battery as a backup power source, and whether the drop in terminal voltage is due to a normal decrease in battery capacity due to the use of the secondary battery during a power outage, or whether the performance of the secondary battery has deteriorated. It is possible to accurately determine whether the problem is caused by the problem, and therefore, the effort and cost of maintaining and managing the secondary battery can be reduced. Further, if a variable charging circuit is used to supply a trickle charging current and a quick charging current, there are advantages such as only one charging circuit is required and the configuration is simpler.
図面は本発明の説明に供するもので、第１図は
本発明方式を適用した通信用端末装置の電源部の
第１の実施例を示すブロツク図、第２図は本発明
の第２の実施例を示すブロツク図である。
１，２……商用電源の入力端子、５，１１……
タイマー回路、７……２次電池、９……急速充電
回路、１０……擬似放電回路、１４……比較回
路、１５……可変充電回路。
The drawings serve to explain the present invention, and FIG. 1 is a block diagram showing a first embodiment of a power supply section of a communication terminal device to which the method of the present invention is applied, and FIG. 2 is a block diagram showing a second embodiment of the present invention. FIG. 2 is a block diagram showing an example. 1, 2... Commercial power supply input terminal, 5, 11...
Timer circuit, 7... Secondary battery, 9... Rapid charging circuit, 10... Pseudo discharge circuit, 14... Comparison circuit, 15... Variable charging circuit.
Claims (1)
する比較回路と、２次電池に所定の値の急速充電
電流を供給する急速充電回路と、２次電池より所
定の値の放電電流を放電させる擬似放電回路と、
前記各動作を司る制御部とを備え、前記制御部
は、前記比較回路で２次電池の端子電圧が基準電
圧以下に降下したことを検出すると、該２次電池
に前記所定の急速充電電流を所定時間充電させ、
更に前記擬似放電回路で所定時間放電させ、再度
比較回路で２次電池の端子電圧を基準電圧と比較
することにより、２次電池劣化を判定するように
なしたことを特徴とする端末装置用予備電源の監
視方式。 ２ ２次電池の端子電圧を所定の基準電圧と比較
する比較回路と、充電電流値を任意の値に設定し
得る可変充電回路と、２次電池より所定の値の放
電電流を放電させる擬似放電回路と、前記各動作
を司る制御部とを備え、前記制御部は通常、前記
可変充電回路よりトリクル充電電流を２次電池に
供給させ、前記比較回路で２次電池の端子電圧が
基準電圧以下に降下したことを検出すると前記可
変充電回路より所定の値の急速充電電流を２次電
池に所定時間供給させ、更に前記擬似放電回路で
所定時間放電させ、再度比較回路で２次電池の端
子電圧を基準電圧と比較することにより２次電池
劣化を判定するようになしたことを特徴とする端
末装置用予備電源の監視方式。[Claims] 1. A comparison circuit that compares the terminal voltage of the secondary battery with a predetermined reference voltage, a quick charging circuit that supplies a predetermined value of quick charging current to the secondary battery, and a a pseudo discharge circuit that discharges a discharge current of a value;
and a control unit that controls each of the operations, and when the comparison circuit detects that the terminal voltage of the secondary battery has dropped below the reference voltage, the control unit applies the predetermined quick charging current to the secondary battery. Charge for a specified time,
The spare for a terminal device is further characterized in that deterioration of the secondary battery is determined by discharging it for a predetermined period of time in the pseudo discharge circuit and again comparing the terminal voltage of the secondary battery with a reference voltage in the comparison circuit. Power supply monitoring method. 2. A comparison circuit that compares the terminal voltage of the secondary battery with a predetermined reference voltage, a variable charging circuit that can set the charging current value to an arbitrary value, and a pseudo discharge that discharges a predetermined value of discharge current from the secondary battery. circuit, and a control unit that controls each of the operations, and the control unit normally causes the variable charging circuit to supply a trickle charging current to the secondary battery, and the comparison circuit determines that the terminal voltage of the secondary battery is equal to or lower than a reference voltage. When it is detected that the voltage has dropped to 1, the variable charging circuit supplies a rapid charging current of a predetermined value to the secondary battery for a predetermined time, the pseudo discharge circuit discharges the battery for a predetermined time, and the comparison circuit again detects the terminal voltage of the secondary battery. A method for monitoring a backup power source for a terminal device, characterized in that deterioration of a secondary battery is determined by comparing the voltage with a reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58013147A JPS59139828A (en) | 1983-01-29 | 1983-01-29 | Monitoring system for preliminary power source of terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58013147A JPS59139828A (en) | 1983-01-29 | 1983-01-29 | Monitoring system for preliminary power source of terminal device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59139828A JPS59139828A (en) | 1984-08-10 |
| JPH04231B2 true JPH04231B2 (en) | 1992-01-06 |
Family
ID=11825045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58013147A Granted JPS59139828A (en) | 1983-01-29 | 1983-01-29 | Monitoring system for preliminary power source of terminal device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59139828A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60106336A (en) * | 1983-11-11 | 1985-06-11 | 日本電信電話株式会社 | Monitoring system of preliminary power source |
| JPS6120252A (en) * | 1984-07-04 | 1986-01-29 | Mitsubishi Electric Corp | Rotary head assembly |
| JPH0347421Y2 (en) * | 1985-10-07 | 1991-10-09 | ||
| JPH01100478A (en) * | 1987-10-14 | 1989-04-18 | Hitachi Elevator Eng & Service Co Ltd | Monitor for preliminary power source for terminal |
| JPH0282177A (en) * | 1988-09-19 | 1990-03-22 | Fujitsu Ltd | Battery device |
| JP4870268B2 (en) * | 2001-01-18 | 2012-02-08 | 本田技研工業株式会社 | Secondary battery life judgment method |
| DE10223557A1 (en) * | 2002-05-28 | 2003-12-18 | Braun Gmbh | Procedure for maintaining a rechargeable battery |
| JP4651316B2 (en) * | 2004-06-21 | 2011-03-16 | 中国電力株式会社 | Battery management system for slave station of remote monitoring system for distribution line |
-
1983
- 1983-01-29 JP JP58013147A patent/JPS59139828A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59139828A (en) | 1984-08-10 |
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